3 min read

Source: Roblox Creator Hub · CC BY 4.0 · View source · Code samples: MIT Imported 2026-10-03. Formatting adapted for this site.

POST /v1/external/login — openapi

Logs in a user to Roblox based on the user's authenticated external provider session

Endpoint

Method: POST

Path: /v1/external/login

Servers:

• https://auth.roblox.com

Request Body

{
  "content": {
    "application/json": {
      "schema": {
        "$ref": "#/components/schemas/Roblox.Authentication.Api.Models.Request.ExternalLoginRequest"
      }
    },
    "text/json": {
      "schema": {
        "$ref": "#/components/schemas/Roblox.Authentication.Api.Models.Request.ExternalLoginRequest"
      }
    }
  },
  "required": true
}

Responses

{
  "200": {
    "description": "OK",
    "content": {
      "application/json": {
        "schema": {
          "$ref": "#/components/schemas/Roblox.Authentication.Api.Models.Response.ExternalIdentityGateway.ExternalLoginResponse"
        }
      }
    }
  },
  "400": {
    "description": "30: Platform is not supported for SSO login."
  },
  "401": {
    "description": "31: No linked account found for SSO login."
  },
  "403": {
    "description": "0: Token Validation Failed\r\n44: Login is unavailable in your country."
  },
  "500": {
    "description": "0: An unexpected error occurred."
  },
  "501": {
    "description": "0: An unexpected error occurred."
  }
}

Authentication

{
  "security": [
    {}
  ],
  "securitySchemes": {
    "roblox-api-key": {
      "type": "apiKey",
      "description": "A configurable key that allows granular access to Roblox resources. See https://create.roblox.com/docs/cloud/auth/api-keys for more information.",
      "name": "x-api-key",
      "in": "header"
    },
    "roblox-legacy-cookie": {
      "type": "apiKey",
      "description": "A browser cookie that represents the identity of a Roblox user. DO NOT SHARE THIS. Sharing this will allow someone to log in as you and to steal your Robux and items. We do not recommend using cookies to call endpoints. When possible, use API keys with the x-api-key header or OAuth 2.0 instead for authentication.",
      "in": "cookie",
      "name": ".ROBLOSECURITY"
    },
    "roblox-oauth2": {
      "type": "oauth2",
      "description": "Build or authorize apps to access Roblox resources. See https://create.roblox.com/docs/cloud/auth/oauth2-overview for more information.",
      "flows": {
        "authorizationCode": {
          "authorizationUrl": "https://apis.roblox.com/oauth/v1/authorize",
          "tokenUrl": "https://apis.roblox.com/oauth/v1/token",
          "refreshUrl": "https://apis.roblox.com/oauth/v1/token",
          "scopes": {}
        }
      }
    }
  }
}

Related Schemas

• Roblox.Authentication.Api.Models.Request.ExternalLoginRequest

• Roblox.Authentication.Api.Models.Response.ExternalIdentityGateway.ExternalLoginResponse

Complete Operation Definition

{
  "tags": [
    "Accounts"
  ],
  "summary": "Logs in a user to Roblox based on the user's authenticated external provider session",
  "requestBody": {
    "content": {
      "application/json": {
        "schema": {
          "$ref": "#/components/schemas/Roblox.Authentication.Api.Models.Request.ExternalLoginRequest"
        }
      },
      "text/json": {
        "schema": {
          "$ref": "#/components/schemas/Roblox.Authentication.Api.Models.Request.ExternalLoginRequest"
        }
      }
    },
    "required": true
  },
  "responses": {
    "200": {
      "description": "OK",
      "content": {
        "application/json": {
          "schema": {
            "$ref": "#/components/schemas/Roblox.Authentication.Api.Models.Response.ExternalIdentityGateway.ExternalLoginResponse"
          }
        }
      }
    },
    "400": {
      "description": "30: Platform is not supported for SSO login."
    },
    "401": {
      "description": "31: No linked account found for SSO login."
    },
    "403": {
      "description": "0: Token Validation Failed\r\n44: Login is unavailable in your country."
    },
    "500": {
      "description": "0: An unexpected error occurred."
    },
    "501": {
      "description": "0: An unexpected error occurred."
    }
  },
  "servers": [
    {
      "url": "https://auth.roblox.com"
    }
  ],
  "x-roblox-engine-usability": {
    "apiKeyWithHttpService": false
  },
  "security": [
    {}
  ],
  "externalDocs": {
    "url": "https://create.roblox.com/docs/cloud/reference/features/accounts#auth_post_v1_external_login"
  }
}